Adiabatic Shear Bands in Simple and Dipolar Viscopolastic Materials

绝热剪切带是局部化现象的名称 在高速率塑性变形期间发生的现象，例如 机械加工、冲击载荷、弹道穿透和金属 形成过程。 由于剪切带被认为是 材料断裂，这些现象的知识，以及因素 抑制或增强其启动和生长的药物， 生产耐用材料。 该研究将集中在：a）开发有效的算法， 对控制场方程进行积分，B）识别最 用于研究此类问题的适当本构模型，c） 研究不同材料建模方法的效果 不均匀性，d）识别影响的材料参数 剪切的开始和随后的发展 研究加载路径对起爆的影响 和剪切带的生长，f）研究 两个或更多个带，以及g）评估由剪切带引起的损坏 to the material材料.

Adiabatic shear banding is the name given to a localization phenomenon that occurs during high-rate plastic deformation, such as machining, shock impact loading, ballistic penetration, and metal forming processes. As shear bands are believed to be precursors to material fracture, a knowledge of these phenomena, and of factors that inhibit or enhance their initiation and growth, is essential to the production of durable materials. The study will concentrate on: a) developing efficient algorithms to integrate the governing field equations, b) identifying the most appropriate constitutive model for the study of such problems, c) studying the effect of different ways of modeling a material inhomogeneity, d) identifying material parameters that affect significantly the initiation and subsequent development of shear bands, e) studying the effect of the loading path on the initiation and growth of a shear band, f) investigating the interaction among two or more bands, and g) assessing the damage caused by a shear band to the material.